How does ECU control the ignition?
05-07-2006, 06:05 PM
#23
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Join Date: Apr 2006
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Re: How does ECU control the ignition?
i said that i can no to explain better for you understand what i need to learn, and i will try to learn reading (or try cuz my bad english) tech articles as the wiki of PGMIF.org or so.
05-08-2006, 04:05 PM
#24
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Join Date: May 2005
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Re: How does ECU control the ignition?
Originally Posted by Joseph Davis
Sad thing is, I think I'm the only one in this thread who understands how the ECU uses each individual distributor sensor, how exactly the ignitor is fired by the ECU, and the exact nature of the tach signal. Well, one of the Chris's might. Not that it matters... because... it's all written in a Helms manual, anyway. There's something to be said for reading the factory service literature a time or two.
Ok smarty pants, how exactly does the ecu communicate with the 7U016 to produce the ignition signal.
Also one thing I speculate on is that the ecu does nothing to control the actual timing sequence. If you notice the signals coming from the distributor sensors all go into the 7U016. So that makes me think that those pulses act like a clock signals and the ecu simply applies an offset so to speak that provides the ignition value. It applies to the fuel injectors firing too, but since there is an individual cylinder correction, then the ecu doesn't apply a bulk value, but instead knows which injector is firing and thus adjusts it accordingly.
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